CVE-2026-9267

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-9267

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9267.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-9267

Published

2026-06-29T08:10:52Z

Modified

2026-10-28T11:19:48Z

Severity

6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

[none]

Details

Eclipse tinydtls before commit b3efd41ad111a4920f599f51ffa4f5e9f1e72221 contains an out-of-bounds read vulnerability in the check_server_certificate() function that allows unauthenticated attackers to trigger reads beyond valid buffer boundaries by crafting a Certificate handshake message with a specific fragment_length value. Attackers can exploit missing buffer length validation before uint24 reads, memcmp, and memcpy operations during DTLS epoch 0 on both client and server paths to cause denial of service on memory-constrained devices.

Database specific

{
    "cna_assigner":  "eclipse",
    "cwe_ids":  [
        "CWE-125"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9267.json"
}

References

Affected packages

Git / github.com/eclipse-tinydtls/tinydtls

Affected ranges

Type

GIT

Repo

https://github.com/eclipse-tinydtls/tinydtls

Events

Introduced

Fixed

b3efd41ad111a4920f599f51ffa4f5e9f1e72221

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "b3efd41ad111a4920f599f51ffa4f5e9f1e72221"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

Other

initial_contribution

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9267.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "56981484379777345487943578540244117054",
            "length":  1321
        },
        "id":  "CVE-2026-9267-a6f55901",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/eclipse-tinydtls/tinydtls/commit/b3efd41ad111a4920f599f51ffa4f5e9f1e72221",
        "target":  {
            "file":  "dtls.c",
            "function":  "check_server_certificate"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "164967579594099702706464224575554867039",
                "109962370517032031202138573779910048302",
                "242915927904298761692919658249395341018"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-9267-faac89c3",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/eclipse-tinydtls/tinydtls/commit/b3efd41ad111a4920f599f51ffa4f5e9f1e72221",
        "target":  {
            "file":  "dtls.c"
        }
    }
]

vanir_signatures_modified

"2026-10-28T11:19:48Z"